shell定期清理mongodb数据
需求:每天定时清除mongodb中某一天之前的数据
思路:
采用shell脚本调用mongodb的命令执行js脚本即可。
步骤:
1.编写email.js文件,作用:清除mongodb某天之前数据,具体代码如下:
[*]Date.prototype.format = function(format)
[*]{
[*] var o =
[*] {
[*] "M+" : this.getMonth()+1, //month
[*] "d+" : this.getDate(), //day
[*] "h+" : this.getHours(), //hour
[*] "m+" : this.getMinutes(), //minute
[*] "s+" : this.getSeconds(), //second
[*] "q+" : Math.floor((this.getMonth()+3)/3), //quarter
[*] "S" : this.getMilliseconds() //millisecond
[*] }
[*] if(/(y+)/.test(format))
[*] format=format.replace(RegExp.$1,(this.getFullYear()+"").substr(4 - RegExp.$1.length));
[*] for(var k in o)
[*] if(new RegExp("("+ k +")").test(format))
[*] format = format.replace(RegExp.$1,RegExp.$1.length==1 ? o[k] : ("00"+ o[k]).substr((""+ o[k]).length));
[*] return format;
[*]}
[*]
[*]function getDay(day){
[*] var today = new Date();
[*] var targetday_milliseconds=today.getTime() + 1000*60*60*24*day;
[*] today.setTime(targetday_milliseconds); //注意,这行是关键代码
[*] var tYear = today.getFullYear();
[*] var tMonth = today.getMonth();
[*] var tDate = today.getDate();
[*] tMonth = doHandleMonth(tMonth + 1);
[*] tDate = doHandleMonth(tDate);
[*] return tYear+"-"+tMonth+"-"+tDate+" 00:00:00";
[*] }
[*]
[*]function doHandleMonth(month){
[*] var m = month;
[*] if(month.toString().length == 1){
[*] m = "0" + month;
[*] }
[*] return m;
[*] }
[*]
[*]
[*]var myDate = new Date();
[*]var datetime = myDate.format("yyyy-MM-dd 00:00:00");
[*]var pre7day = getDay(-7);
[*]print("today="+datetime+"deleteday="+pre7day);
[*]datetime= new Date(datetime);
[*]pre7day= new Date(pre7day);
[*]var count=db.Mail.find({'updateTime':{'$lt':pre7day}}).count();
[*]print("count="+count);
[*]db.Mail.remove({'updateTime':{'$lt':pre7day}});
[*]print('前7天邮件清理完毕...');
[*]exit
2. 编写shell脚本mongo_clean.sh代码如下:
[*]#!/bin/bash
[*]#清空mongodb中的前7天邮件: guoxin.ai@renren-inc.com
[*]
[*]/data/web/mongodb/mongodb-linux-x86_64-2.4.5/bin/mongo 10.3.18.80:27017/mail -quiet /data/web/email.js
3.加入crontab中:
10 0 * * * sh /data/web/agx/mongo_clean.sh
即完成shell操作mongodb执行定时任务,根据任务不同,修改对应的js文件。
参考文章:http://blog.csdn.net/alen1985/article/details/12712111
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